Because of this, you need to mix oil (the lubricant) with fuel before putting it in a 2 stroke engine—otherwise, the engine will seize up. In a 4 stroke engine, air and fuel (and the combustion ...

While mower maintenance is infrequent, it’s also important to do properly—starting with the correct type of oil for lawn ...

Read on to find out why we count strokes. Read more: Popular Synthetic Oil Brands Ranked Worst To Best A four-stroke engine uses four motions of a piston to complete one cycle of combustion.